Yes, this (Lyle Ramshaw's paper). My impression is that his work succeeds in finding the simplest human-comprehensible way of defining these objects. It's very much not the pragmatic "local hacker" approach to graphics, which can be forbidding.

I also enjoyed this interview with Tony DeRose: https://www.youtube.com/watch?v=mX0NB9IyYpU

It can be so discouraging for people to encounter this stuff (geometric modelling primitives) as a mysterious incantation, essentially as raw algebraic code. I think there's probably more scope to humanize it, as Ramshaw and DeRose's demonstrations suggest.